Agilent Technologies
Agilent FID Maintenance Kit Instructions
For 7890, 7820, 6850, and 6890 Series GCs
Overview
This document contains instructions for two different FID
Maintenance Kits.
Please review the whole document before starting the
procedures.
Materials Required for FID Maintenance
• One of the two maintenance kits listed in Table 1.
• The appropriate FID Jet for your configuration and
application. See “Selecting a Replacement FID Jet” on page 2.
• T20 Torx screwdriver.
• 1/4-inch nut driver.
• Tweezers.
• 1/4 x 5/16-inch wrench.
• 7/16 x 9/16-inch wrench if adaptable FID.
Table 1 Available FID Maintenance Kits
Part Number Description Purpose
G1531-67000 FID Maintenance Kit for “Cleaning”
Contains: Instructions, ignitor glow-plug,
2 PTFE collector insulators, FID housing gasket,
cleaning brushes, jet cleaning wire
Key parts are replaced, most are cleaned per
the instructions provided. Jet and column
adapter ordered separately. More labor
intensive – about 1 hour labor.
G1531-67001 FID Maintenance Kit for “Rebuilding”
Contains: Instructions and a complete FID
collector assembly
The entire collector assembly including the
ignitor is replaced.
The jet and column adapter must be ordered
separately – about 15 minutes labor.
2 FID Maintenance Kit Instructions
• Lint-free gloves.
• Clean cloth.
• Reagent grade methanol and glassware.
• Ultrasonic bath (optional).
• Aqueous detergent.
Preparing the GC for Maintenance
Load a GC Maintenance Method if you have one prepared, or do
the following:
1 Set the oven temperature to 35 °C. When the temperature is
reached, set the oven to “OFF”.
2 Set the FID flame to “OFF”.
3 Set the FID temperature to “OFF”.
4 Remove the column from the FID.
Selecting a Replacement FID Jet
Determine your type of FID
Your FID will be one of two types: “Capillary Optimized” or
“Adaptable” (for capillary and packed columns).
Capillary Optimized Jets
ID Jet type Part number Jet tip id Length
1 Capillary G1531-80560 0.29 mm (0.011 inch) 48 mm
2 Capillary, high- temperature
(use with simulated distillation)
G1531-80620 0.47 mm (0.018 inch) 48 mm
FID Maintenance Kit Instructions 3
Adaptable FID Jets
General Precautions
ID Jet type Part number Jet tip id Length
1 Capillary 19244-80560 0.29 mm (0.011 inch) 61.5 mm
2 Capillary, high- temperature
(use with simulated distillation)
19244-80620 0.47 mm (0.018 inch) 61.5 mm
3 Packed 18710-20119 0.46 mm (0.018 inch) 63.6 mm
4 Packed, wide-bore
(use with high-bleed applications)
18789-80070 0.76 mm (0.030 inch) 63.6 mm
WARNING
During this maintenance procedure, wear safety glasses and
follow normal standard safety procedures.
4 FID Maintenance Kit Instructions
Detector Disassembly Procedure
Collector Assembly Removal — Follow these initial steps for either of the
FID Maintenance Kits
1 Disconnect the ignitor cable connector.
2 Remove the three T20 Torx screws that secure the collector
to the FID body.
CAUTION
Components can be damaged by static electricity: be sure to wear
an ESD strap grounded to the GC chassis while performing this
procedure.
CAUTION
The next step exposes the interconnect spring. Be careful not to
touch or disfigure the spring while working on the FID. Any dirt or
bending will reduce the sensitivity of your detector.
6 FID Maintenance Kit Instructions
Procedure for Performing Maintenance with the FID “Cleaning” Kit – Part
Number G1531-67000
Disassemble the collector assembly
Figure 1 Parts included in the FID Cleaning Kit (jet cleaning wire not
shown)
1 Remove the ignitor with a 5/16-inch wrench.
2 Loosen and remove the knurled brass retaining nut and
spring washer.
CAUTION
To avoid contaminating the FID, wear clean, lint-free gloves when
handling the collector assembly.
FID Maintenance Kit Instructions 7
3
Remove the castle assembly.
4 Remove the collector and upper PTFE insulator.
5 Remove the Lower PTFE Insulator.
8 FID Maintenance Kit Instructions
6
Remove the bottom silicone rubber housing gasket.
Cleaning the FID components
Procedure: cleaning the collector
1 Clean the inside of the collector with methanol using the
larger brush provided in the kit.
2 Rinse the inside and outside of the collector with methanol.
3 Air dry the collector – handle with gloves or tweezers.
FID Maintenance Kit Instructions 9
Optional Ultrasonic Cleaning
1 Place the parts to be cleaned in your glassware, cover them
with the aqueous detergent, and place them in the ultrasonic
bath.
2 Sonicate the parts for 1 to 5 minutes.
3 Clean the inside of the collector with the brush provided.
Remove the parts from the bath.
4 Rinse the parts in distilled water.
5 Rinse all surfaces of the parts in methanol – inside and
outside surfaces.
To insure good rinsing use either a PTFE wash bottle or a
beaker.
Figure 2 Castle assembly
WARNING
This procedure summarizes the general steps for cleaning the
parts. You need to follow the standard safety practices of your
laboratory for handling chemicals. For example, wear the
appropriate safety eye glasses, lab coat, and gloves.
CAUTION
The FID castle is coated with a layer of PTFE. Ultrasonic cleaning of
this part for more than 5 to 10 seconds will damage this coating.
10 FID Maintenance Kit Instructions
Reassembling the FID collector assembly
1 Insert the first PTFE insulator from the kit into the collector
housing.
2 Insert the cleaned collector through the PTFE Insulator –
The long end goes down!
3 Place the second insulator over the collector.
Long end
Orientation of the collector and
insulators in the FID
FID Maintenance Kit Instructions 11
4
Place the castle assembly on top of the collector with the
threaded hole for the ignitor oriented toward the slot for the
interconnect.
5 Place the spring washer over the castle and screw on the
knurled nut.
6 Tighten the knurled nut firmly.
12 FID Maintenance Kit Instructions
7
Turn over the collector assembly and install the new silicone
rubber gasket.
8 Make sure that the gasket lays flat against the bottom of the
collector.
9 Install the new ignitor with the copper washer installed as
shown below.
10 Tighten the ignitor with a 5/16-inch wrench.
14 FID Maintenance Kit Instructions
3
Examine the detector base for any particulates – blow out
the base with compressed air or nitrogen.
Clean the Detector Base
Clean any built-up graphite from the detector base. The
“Capillary Optimized” base is shown below.
FID Maintenance Kit Instructions 15
If you have an adaptable FID base – remove the capillary
adapter with a 9/16-inch wrench, and clean any graphite out of
the adapter out with a wire. Optionally, sonicate the part.
Re-install the adapter with a new 1/4-inch Swagelok nut and
graphite/Vespel ferrule or brass front and back ferrule.
Clean or Replace the Jet
Agilent recommends replacing the FID Jet during maintenance.
However, the jet can be cleaned using the following procedure:
1 Run a .010-inch cleaning wire through the tip of the jet.
2 Run the wire back and forth a few times until it moves
smoothly. Be careful not to scratch the jet.
3 Optional: Immerse the jet in a beaker of aqueous detergent.
Place it in an ultrasonic bath for 1–5 minutes.
4 Rinse the jet in methanol.
5 Air dry the jet.
The FID jet should not be re-used more than once.
CAUTION
Scratches on the FID jet affects its performance. If you choose to
clean the jet, be sure not to scratch or bend the jet.
NOTE
If the jet becomes bent or disfigured during the cleaning process, discard
it and use a new replacement jet.
16 FID Maintenance Kit Instructions
Install the Cleaned or Replacement Jet
If the jet is new, tighten the jet 1/6-turn past finger tight.
Install the Replacement or Cleaned Collector Assembly
1 Carefully lower the new or cleaned and reassembled
collector assembly straight down on to the FID base – the
interconnect spring will move into the correct position.
2 Secure it firmly with the three T20 Torx screws.
CAUTION
If you are re-using the old jet be very careful not to over-tighten the
jet to avoid breaking it off in the FID Base!
FID Maintenance Kit Instructions 17
3
Reconnect the ignitor extension cable.
4 Tighten the knurled nut and ignitor one more time.
Final Procedure
1 Trim and re-install the column.
2 Heat the detector to your normal operating temperature.
3 Check the FID output with the flame off (check the leakage
current). The output should be stable and < 1.0 pA.
4 Enter or reload your method.
5 Light the flame.
6 Bakeout the detector at 350 °C for 20 minutes.
7 Set the FID to normal operating temperature.
WARNING
Inlets, detectors, and the oven are insulated with fibrous
materials which may cause irritation to skin, eyes, and/or
mucous membranes. Always wear gloves when working with the
insulation. Additionally, if the insulation is flaky/crumbly, wear
protective eyewear and a suitable breathing mask and/or
respirator.
Agilent Technologies
8 If you have the “Adaptable” FID, re-tighten the capillary
column adapter with a 9/16-inch wrench. Install the FID
insulating cup over the capillary adapter.
9 Check the FID output at normal operating temperature. The
output should be stable and < 20.0 pA.
Warranty
The material contained in this document is provided “as is,” and is subject to being
changed, without notice, in future editions. Further, to the maximum extent permitted by
applicable law, Agilent disclaims all warranties, either express or implied, with regard to
this manual and any information contained herein, including but not limited to the implied
warranties of merchantability and fitness for a particular purpose. Agilent shall not be
liable for errors or for incidental or consequential damages in connection with the
furnishing, use, or performance of this document or of any information contained herein.
Should Agilent and the user have a separate written agreement with warranty terms
covering the material in this document that conflict with these terms, the warranty terms
in the separate agreement shall control.
© Agilent Technologies, Inc., 2015
Printed in USA or China
First edition, November 2015
Agilent Technologies, Inc.
2850 Centerville Road
Wilmington, DE 19808-1610 USA
安捷伦科技 （上海）有限公司
上海市浦东新区外高桥保税区
英伦路 412 号
联系电话： （800）820 3278
G3431-90400
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Agilent Technologies G1531-67001 Instructions Manual
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